Massimo Franceschetti , Advanced Network Science group (ANS) of the California Institute of Telecommunications and Information Technologies (CALIT2), Dept. of Electrical and Computer Engineering, University of California, San Diego 92093, USA

Paolo Minero , Advanced Network Science group (ANS) of the California Institute of Telecommunications and Information Technologies (CALIT2), Dept. of Electrical and Computer Engineering, University of California, San Diego 92093, USA